#include<stdio.h>
 
int main(int argc, const char *argv[])
{
	char a1[32] = "hello";
	char a2[32] = "123";
 
	char *p1 = a1;
	char *p2 = a2;
 
	while(*p2){
		*p1++ = *p2++; 
	}
	*p1 = *p2;
	printf("%s\n",a1);
	return 0;
}